// 变量
// 选择器的语法糖
@color:deepPink;
@m:margin;
@selector:#wrap;
* {
	@{m}: 0;
	padding: 0;
}
@{selector} {
	position: relative;
	width: 300px;
	height: 400px;
	border: 1px solid;
	margin: 0 auto;
	.inner {
		position: absolute;
		left: 0;
		right: 0;
		top: 0;
		bottom: 0;
		margin: auto;
		background: @color;
		height: 100px;
		width: 100px;
	}
}
